求过A(-1,10)且被圆x2+y2-4x-2y-20=0截得的弦长为8的直线方程.
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![求过A(-1,10)且被圆x2+y2-4x-2y-20=0截得的弦长为8的直线方程.](/uploads/image/z/2487339-27-9.jpg?t=%E6%B1%82%E8%BF%87A%28-1%2C10%29%E4%B8%94%E8%A2%AB%E5%9C%86x2%2By2-4x-2y-20%3D0%E6%88%AA%E5%BE%97%E7%9A%84%E5%BC%A6%E9%95%BF%E4%B8%BA8%E7%9A%84%E7%9B%B4%E7%BA%BF%E6%96%B9%E7%A8%8B.)
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